package com.nowcoder.community.service;

import com.nowcoder.community.dao.CommentMapper;
import com.nowcoder.community.entity.Comment;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.SensitiveFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.util.HtmlUtils;

import javax.xml.crypto.Data;
import java.util.Date;
import java.util.List;

@Service
public class
CommentService implements CommunityConstant {
    @Autowired
    private CommentMapper commentMapper;
    @Autowired
    private SensitiveFilter sensitiveFilter;
    @Autowired
    private DiscussPostService discussPostService;

    /**
     * 查询评论方法
     * @param entityType
     * @param entityId
     * @param offset
     * @param limit
     * @return
     */
    public List<Comment> findCommentsByEntity(int entityType, int entityId, int offset, int limit){
        return commentMapper.selectCommentsByEntity(entityType,entityId,offset,limit);
    }


    public int findCommentCount(int entityType, int entityId){
        return commentMapper.selectCountByEntity(entityType,entityId);
    }

    public Comment findCommentById(int id){
        return commentMapper.selectCommentById(id);
    }
    /**
     * 增加评论业务
     */
    @Transactional(isolation = Isolation.READ_COMMITTED,propagation = Propagation.REQUIRED)
    public int addComment(Comment comment){
        if (comment == null){
            throw new IllegalArgumentException("参数不能为空");
        }
        //添加评论
        comment.setContent(HtmlUtils.htmlEscape(comment.getContent()));
        comment.setContent(sensitiveFilter.filter(comment.getContent()));
        int rows = commentMapper.insertComment(comment);

        //更新评论数量
        if (comment.getEntityType()==ENTITY_TYPE_POST){
            int count = commentMapper.selectCountByEntity(comment.getEntityType(), comment.getEntityId());
            discussPostService.updateCommentCount(comment.getEntityId(),count);
        }
        return rows;
    }

    public int findCommentSortById(int entityType,int entityId,int id){
        return commentMapper.selectCommentSortById(entityType,entityId,id);
    }
    /*public int findIdFromCreateDate(Date createTime){
        return commentMapper.selectIdFromCreateTime(createTime);
}*/

//查找某用户的回复
    public List<Comment> findCommentsByUserId(int userId,int entityType,int offset, int limit){
        return commentMapper.selectCommentsByUserId(userId,entityType,offset,limit);
    }
    //查找某用户回复数
    public int findCountByUserId(int userId,int entityType){
        return  commentMapper.selectCountByUserId(userId,entityType);
    }
}
